/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Reflection;

namespace Spring.Aop.Interceptor;

/// <summary>
/// Trivial interceptor that can be introduced into an interceptor chain to
/// aid in debugging.
/// </summary>
/// <author>Rod Johnson</author>
/// <author>Choy Rim (.NET)</author>
public class NopInterceptor : IMethodBeforeAdvice
{
    protected int instanceId;
    protected int count;

    public NopInterceptor() : this(0)
    {
    }

    public NopInterceptor(int instanceId)
    {
        this.instanceId = instanceId;
    }

    public int InstanceId
    {
        get { return instanceId; }
    }

    public int Count
    {
        get { return this.count; }
    }

    public void Before(MethodInfo method, object[] args, object target)
    {
        ++count;
    }

    public override bool Equals(Object other)
    {
        if (!(other is NopInterceptor))
        {
            return false;
        }

        if (this == other)
        {
            return true;
        }

        return (instanceId == ((NopInterceptor) other).InstanceId)
               && (count == ((NopInterceptor) other).count);
    }

    public override int GetHashCode()
    {
        return instanceId + 13 * count;
    }
}
